PPDCP-ABE: Privacy-preserving decentralized ciphertext-policy attribute-based encryption

Jinguang Han, Willy Susilo, Yi Mu, Jianying Zhou, Man Ho Allen Au

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

28 Citations (Scopus)

Abstract

Cipher-policy attribute-based encryption (CP-ABE) is a more efficient and flexible encryption system as the encryptor can control the access structure when encrypting a message. In this paper, we propose a privacy-preserving decentralized CP-ABE (PPDCP-ABE) scheme where the central authority is not required, namely each authority can work independently without the cooperation to initialize the system. Meanwhile, a user can obtain secret keys from multiple authorities without releasing his global identifier (GID) and attributes to them. This is contrasted to the previous privacy-preserving multi-authority ABE (PPMA-ABE) schemes where a user can obtain secret keys from multiple authorities with them knowing his attributes and a central authority is required. However, some sensitive attributes can also release the user's identity information. Hence, contemporary PPMA-ABE schemes cannot fully protect users' privacy as multiple authorities can cooperate to identifier a user by collecting and analyzing his attributes. Therefore, it remains a challenging and important work to construct a PPMA-ABE scheme where the central authority is not required and both the identifiers and the attributes are considered.
Original languageEnglish
Title of host publicationComputer Security, ESORICS 2014 - 19th European Symposium on Research in Computer Security, Proceedings
PublisherSpringer Verlag
Pages73-90
Number of pages18
EditionPART 2
ISBN (Print)9783319112114
DOIs
Publication statusPublished - 1 Jan 2014
Externally publishedYes
Event19th European Symposium on Research in Computer Security, ESORICS 2014 - Wroclaw, Poland
Duration: 7 Sep 201411 Sep 2014

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
NumberPART 2
Volume8713 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349

Conference

Conference19th European Symposium on Research in Computer Security, ESORICS 2014
CountryPoland
CityWroclaw
Period7/09/1411/09/14

Keywords

  • CP-ABE
  • decentralization
  • privacy

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Computer Science(all)

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